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3EM13853AF
Issue 01, September 2007
DLP-145
Fan Tray Assembly Replacement (18 RU Shelf)
PURPOSE
This procedure provides instructions to remove and install a fan tray at top of 1677 SONET Link
shelf.
PREREQUISITES
Read the following bullet list before starting this procedure.
•
Although this procedure is normally done to replace a failed (inactive) component,
always verify component state before removal.
GENERAL
Refer to the 1677 SONET Link Address and Location Guide (PN 3EM13854AD) to determine module
location and address.
STEP
PROCEDURE
1
DANGER: Possibility of personal injury. Modules can be installed or removed with
bay power on. Hazardous electrical potentials are present; use extreme care when
installing or removing modules with power on.
WARNING: Possibility of equipment damage. Operating a 1677 SONET Link
2
shelf for more than 3 minutes with the fan-tray assembly removed or not
functioning properly, will cause the shelf to overheat and disrupt traffic.
Make sure the replacement fan-tray assembly is close by, unpacked, and ready to
install immediately. Also, check the outer edge of the replacement fan-tray assembly
to make sure the EMI gasket is in place and not damaged.
3
DANGER: Possibility of personal injury. Keep fingers away from the rotating fan
blades. Pull the fan-tray assembly by the thumbscrews only. Wait for the fan blades
to stop spinning before attempting to remove the fan-tray assembly completely
from the chassis.
Loosen four captive screws on front of fan tray assembly.
4
Carefully slide out fan assembly.
5
Line up replacement fan assembly with rails in the shelf.
6
Slide replacement fan assembly into place.
7
Fan Tray Assembly Replacement (18 RU Shelf)
DLP-145
5-99
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